CN104712702B - Height adjustable damping device - Google Patents
Height adjustable damping device Download PDFInfo
- Publication number
- CN104712702B CN104712702B CN201410645863.4A CN201410645863A CN104712702B CN 104712702 B CN104712702 B CN 104712702B CN 201410645863 A CN201410645863 A CN 201410645863A CN 104712702 B CN104712702 B CN 104712702B
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- China
- Prior art keywords
- pressure chamber
- half portion
- buffer unit
- fluid
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000013016 damping Methods 0.000 title abstract 2
- 239000012530 fluid Substances 0.000 claims abstract description 147
- 239000000872 buffer Substances 0.000 claims description 103
- 238000007667 floating Methods 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 10
- 230000005284 excitation Effects 0.000 claims description 9
- 230000004044 response Effects 0.000 claims description 8
- 230000003139 buffering effect Effects 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 230000009849 deactivation Effects 0.000 claims description 3
- 230000001133 acceleration Effects 0.000 description 22
- 238000000034 method Methods 0.000 description 11
- 230000008859 change Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 239000012556 adjustment buffer Substances 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
- B60G13/02—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally
- B60G13/06—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally of fluid type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
- B60G13/02—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally
- B60G13/06—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally of fluid type
- B60G13/12—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally of fluid type quasi-fluid, i.e. having powdered medium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/0152—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit
- B60G17/0157—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit non-fluid unit, e.g. electric motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/044—Self-pumping fluid springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/165—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with two or more cylinders in line, i.e. in series connection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/185—Bitubular units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/56—Means for adjusting the length of, or for locking, the spring or damper, e.g. at the end of the stroke
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/06—Characteristics of dampers, e.g. mechanical dampers
- B60G17/08—Characteristics of fluid dampers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/20—Type of damper
- B60G2202/24—Fluid damper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/30—Spring/Damper and/or actuator Units
- B60G2202/32—The spring being in series with the damper and/or actuator
- B60G2202/322—The spring being in series with the damper and/or actuator the damper being controllable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/25—Stroke; Height; Displacement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/10—Damping action or damper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/30—Height or ground clearance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2600/00—Indexing codes relating to particular elements, systems or processes used on suspension systems or suspension control systems
- B60G2600/22—Magnetic elements
- B60G2600/26—Electromagnets; Solenoids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/04—Fluids
- F16F2224/045—Fluids magnetorheological
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid-Damping Devices (AREA)
- Vehicle Body Suspensions (AREA)
- Vibration Prevention Devices (AREA)
Abstract
A damping device includes a housing defining a pressure chamber, containing a magnetorheological fluid. A rod is slideably coupled to the housing to adjust a length of the housing. A piston is attached to the rod and disposed within the pressure chamber. The piston is immersed within the magnetorheological fluid, and separates the pressure chamber into a first half and a second half. An electromagnet is disposed in magnetic contact with the magnetorheological fluid, and is operable to apply a magnetic field to the magnetorheological fluid to increase viscosity of the magnetorheological fluid to prevent movement of the rod relative to the housing. The magnetorheological fluid is free to flow through a fluid port in the piston, between a first half and a second half of the pressure chamber, in the absence of the magnetic field from the magnetic source to allow adjustment of the length.
Description
Technical field
This patent disclosure relates generally to it is used for the buffer unit of vehicle, and the method for the length of adjustment buffer unit.
Background technology
Vehicle uses buffer unit, such as vibration absorbing device or pillar in each corner portion of vehicle.Buffer unit
Row buffering is entered to the relative motion (jolting) between the wheel and automobile body of vehicle.Generally, buffer unit is included in attached
Connect the housing that end is attached to automobile body, and the bar that the wheel of vehicle is attached in lower attachment end.Bar includes arranging
The piston interacted with fluid (such as oil) in the housing.Bar and piston are movable relative to housing along longitudinal axis.Wheel
Motion relative to vehicle body causes bar and piston to move in a fluid.Interaction energy absorption between piston and fluid, by
This causes relative motion between them to slow down or be buffered.
Because bar is relative to housing motion, the length of the buffer unit being more than attached between end and lower adjustment end with
Relative motion between wheel and vehicle body and change.However, the position of upper attachment end and housing generally remain it is constant.
The content of the invention
Buffer unit includes the first pressure chamber for extending along a longitudinal axis, and accommodates first fluid.First bar is along longitudinal direction
Axis extends, and including the inner end being arranged in first pressure chamber.First bar is along longitudinal axis relative to first pressure
Chamber is movable.First piston is attached to the inner end of the first bar, and interacts with first fluid, with to the first bar edge longitudinal direction
Row buffering is entered in the motion of axis.Second pressure chamber is extended along a longitudinal axis, and accommodates magneto-rheological fluid.Second bar is along longitudinal axiss
Line extends.Second piston is attached to the second bar, and interacts with magneto-rheological fluid.Electromagnet is set to and magneto-rheological fluid magnetic
Property contact.Electromagnet is operable as applying magnetic field to magneto-rheological fluid in response to electric current, to increase the viscosity of magneto-rheological fluid.
The viscosity of magneto-rheological fluid is increased so that position of the second piston in second pressure chamber is fixed.
A kind of buffer unit for vehicle is also provided.Buffer unit includes concentrically arranging with regard to longitudinal axis and edge
The housing that longitudinal axis extend.Housing limits pressure chamber.Magneto-rheological fluid is arranged in pressure chamber.Bar is connected to housing,
And extend along a longitudinal axis.Bar is movable relative to housing, with the length between the attachment end of adjusting lever and housing.Piston is attached
To bar and it is arranged in pressure chamber.Piston submerges in magneto-rheological fluid, and pressure chamber is divided into into the first half portion and the second half
Portion.Piston includes the first half portion and the second half portion with second pressure chamber each fluid port for being in fluid communication, to allow
Magneto-rheological fluid flows between first half portion and the second half portion of second pressure chamber.Magnetic source is set to and magneto-rheological fluid
Magnetic contact.Electromagnet is operable as applying magnetic field to magneto-rheological fluid, to increase the viscosity of magneto-rheological fluid, in case stopping bar phase
For housing motion.Not having in the case of the magnetic field of magnetic source, magneto-rheological fluid pressure chamber the first half portion and
Flow freely between second half portion, to allow the adjustment of length.
The method that the length of the buffer unit of adjustment vehicle is also provided.Method includes selecting the desired length of buffer unit,
And the current length of determination buffer unit.Buffer unit current length not in the preset range of desired length when, electromagnetism
Body is de-energized, to allow magneto-rheological fluid that the stream of piston is flowed through between first half portion and the second half portion of pressure chamber
Body end mouth, to allow bar along longitudinal axis.When the current length of buffer unit is in the preset range of desired length, electricity
The energized viscosity to increase magneto-rheological fluid of magnet and magneto-rheological fluid is prevented in the first half portion of pressure chamber and the second half
Flow between portion, axial location of the bar along longitudinal axis is fixed.
Thus, thus the energized viscosity to increase magneto-rheological fluid of electromagnet prevent magnetic current unsteady flow to viscoelastic solid
Body moves the fluid port of the second piston by submerging in magneto-rheological fluid, and second piston and the second bar are fixed or locked
It is in place.Buffer unit can jolt circulation to adjust the length of buffer unit using vehicle.For example, the length of buffer unit can
To increase by deactivating to electromagnet at the lower end or bottom in circulation of jolting, magnetorheological fluid flow is thus allowed
By the fluid port of second piston, and subsequently in the upper top excitation electromagnet of circulation of jolting, by the second bar along vertical
It is in position to axis.Alternatively, the length of buffer unit can be in the upper top in circulation of jolting by deactivating
Encourage electromagnet and reduce, thus allow fluid port of the magnetorheological fluid flow by second piston, and subsequently in circulation of jolting
Lower end or bottom excitation electromagnet, the second bar is in position along longitudinal axis.Thus, the length of buffer unit, and by
Relative altitude between the wheel and automobile body of this vehicle can be adjusted in the case where extra power source is not needed, extra dynamic
Power source is, for example, motor, hydraulic pump etc..
According to a specific embodiment, there is provided a kind of buffer unit, including：
First pressure chamber, extends along a longitudinal axis and accommodates first fluid；
First bar, extends along a longitudinal axis and including the inner end being arranged in first pressure chamber, wherein the first bar
It is movable relative to first pressure chamber along longitudinal axis；
First piston, is attached to the inner end of the first bar and interacts with first fluid, with to the first bar edge longitudinal direction
Row buffering is entered in the motion of axis；
Second pressure chamber, extends along a longitudinal axis and accommodates magneto-rheological fluid；
Second bar, extends along a longitudinal axis；
Second piston, is attached to the second bar and interacts with magneto-rheological fluid；
Electromagnet, is set to and magneto-rheological fluid magnetic contact, and is operable as in response to electric current to magneto-rheological fluid
Apply magnetic field, to increase the viscosity of magneto-rheological fluid, the position of second piston is fixed in second pressure chamber.
Preferably, wherein first pressure chamber and second pressure chamber are separated from each other and are not in fluid communication each other.
Preferably, wherein the electromagnet is arranged in second pressure chamber.
Preferably, wherein the electromagnet is attached to the second piston in second pressure chamber and can transport with the second piston
It is dynamic.
Preferably, wherein the magneto-rheological fluid includes iron particle, and wherein first fluid does not include iron particle.
Preferably, wherein second pressure chamber is divided into the first half portion and the second half portion by second piston, and including with second
First half portion of pressure chamber and each fluid port being in fluid communication of the second half portion, there is no the magnetic from electromagnet
Magneto-rheological fluid is allowed to flow between first half portion and the second half portion of second pressure chamber in the case of.
Preferably, buffer unit further includes the second floating piston, and it is arranged in second pressure chamber, presses second
In in first half portion or the second half portion of power chamber, by first half portion or the second half portion of second pressure chamber
One is divided into the fluid chamber for accommodating magneto-rheological fluid and the gas chamber for accommodating nitrogen.
Preferably, buffer unit further includes electronic control unit, and the electronic control unit is connected to electromagnet and can
The electric current for control to electromagnet, wherein electronic control unit is operated to include all hardware and software necessary to following operation：
Electromagnet is deactivated, to allow magneto-rheological fluid to flow between first half portion and the second half portion of second pressure chamber
It is dynamic；
Excitation electromagnet, to prevent magneto-rheological fluid from flowing between first half portion and the second half portion of second pressure chamber
It is dynamic；With
The excitation and deactivation of control electromagnet, to realize expectation axial location of the second piston along longitudinal axis.
Preferably, buffer unit further includes main casing, and the main casing limits the first pressure chamber.
Preferably, wherein the main casing limits second pressure chamber, first pressure chamber and second pressure chamber are along vertical
It is coaxially aligned with each other with the orientation of end-end to axis.
Preferably, wherein the second bar includes being arranged on inner end in second pressure chamber, second piston is attached to the
The inner end of two bars, and wherein the second bar is movable along longitudinal axis relative to second pressure chamber.
Preferably, wherein the second bar includes defining the interior zone of second pressure chamber, second piston and magnetic current unsteady flow
Body is arranged in the interior zone of the second bar.
Preferably, wherein the second bar is arranged on outside the outer surface of main casing radially with respect to a longitudinal axis, and wherein
Second bar is movable relative to main casing.
According to another specific embodiment, there is provided a kind of buffer unit for vehicle, the buffer unit includes：
Housing, concentrically arranges with regard to longitudinal axis and extends along the longitudinal axis, and wherein housing limits pressure chamber
Room；
Magneto-rheological fluid, in being arranged on pressure chamber；
Bar, is connected to housing and extends along a longitudinal axis, and wherein bar is movable relative to housing, with the attachment end of adjusting lever
Length and housing between；
Piston, is attached to bar and is arranged in pressure chamber, and wherein piston submerges in magneto-rheological fluid and by pressure chamber
Be divided into the first half portion and the second half portion, and wherein piston include it is each with the first half portion of second pressure chamber and the second half portion
The fluid port of individual fluid communication, to allow magneto-rheological fluid to flow between first half portion and the second half portion of second pressure chamber
It is dynamic；With
Magnetic source, is set to and magneto-rheological fluid magnetic contact, and is operable as applying magnetic field to magneto-rheological fluid, to increase
The viscosity of big magneto-rheological fluid, in case stopping bar is relative to housing motion, wherein not having in the case of the magnetic field of magnetic source
Magneto-rheological fluid is flowed freely between first half portion and the second half portion of pressure chamber, to allow the adjustment of the length.
According to yet another embodiment, there is provided a kind of method of the length of the buffer unit of adjustment vehicle, methods described
Including：
Select the desired length of buffer unit；
Determine the current length of buffer unit；
Electromagnet is deactivated, it is logical to allow magneto-rheological fluid to flow between first half portion and the second half portion of pressure chamber
Cross the fluid port of piston, with the current length of buffer unit not in the preset range relative to desired length when allow bar
Along longitudinal axis；With
Excitation electromagnet, to increase the viscosity of magneto-rheological fluid and prevent magneto-rheological fluid in the first half portion of pressure chamber
And second flow between half portion, with when the current length of buffer unit is in the preset range relative to desired length by bar edge
The axial location of longitudinal axis is fixed.
Preferably, method further includes to be caused using jolting for vehicle bar along longitudinal axis, while electromagnet
It is de-energized to adjust the length of buffer unit.
Preferably, method further includes the length for increasing buffer unit with jolting loop iteration by each, incites somebody to action
Buffer unit is extended in the preset range of desired length.
Preferably, method is further included：
Sensing wheel of vehicle position relative to automobile body position over time；
The speed of sensing vehicle；
The acceleration of sensing automobile body；
It is more than more than the precalculated position limit, car speed over time relative to the position of vehicle body in the position of wheel
When the predetermined speed limit and vehicle body acceleration are less than the predetermined acceleration limit, electromagnet is deactivated, to adjust buffer unit length；
With
It is less than less than the precalculated position limit, car speed over time relative to the position of vehicle body in the position of wheel
When the predetermined speed limit or vehicle body acceleration are more than the predetermined acceleration limit, electromagnet is encouraged, to prevent the adjustment of buffer unit.
Preferably, include wherein selecting the desired length of buffer unit, in car speed the predetermined speed limit, vehicle body are more than
Acceleration when being more than predetermined length less than the current length of the predetermined acceleration limit and buffer unit, reduce buffer unit
Length.
Preferably, include wherein selecting the desired length of buffer unit, in car speed the predetermined speed limit, vehicle body are less than
Acceleration when being less than predetermined length more than the current length of the predetermined acceleration limit and buffer unit, increase buffer unit
Length.
Can be easily geographical in the detailed description made to the better model for implementing the present invention carried out below in conjunction with accompanying drawing
The above-mentioned the features and advantages of the present invention of solution and further features and advantages.
Description of the drawings
Fig. 1 is displayed as the schematic cross-sectional view of the buffer unit for vehicle in punctured position.
Fig. 2 is displayed as the schematic cross-sectional view of the buffer unit in extended position.
Fig. 3 is displayed as the schematic cross-sectional view of the alternative embodiment of the buffer unit in punctured position.
Fig. 4 is displayed as the schematic cross-sectional view of the alternative embodiment of the buffer unit in extended position.
Specific embodiment
It will be understood by those skilled in the art that for example " on ", D score, " upwards, " downward ", " top ", " bottom " etc. are for describing
Accompanying drawing, and limitation of the scope of the invention is not represented, the scope of the present invention is defined by the appended.Further, herein
The present invention can be described in the way of function and/or logical block components and/or various process steps.It should be understood that this
Modular unit can include any amount of hardware, software and/or firmware component (it is configured to perform concrete function).
Referring to accompanying drawing, wherein identical reference indicates in the several figures identical part, and buffer unit is substantially in Fig. 1
With 2 in illustrate 20.Buffer unit 20 is configurable to but is not limited to use in the shock absorber or suspension support group of vehicle
Part (not shown).
Referring to Fig. 1 and 2, buffer unit 20 includes main casing 22, and the main casing extends and with regard to vertical along longitudinal axis 24
Concentrically arrange to axis.Main casing 22 limits first pressure chamber 26 and second pressure chamber 28.First pressure chamber 26
It is coaxially aligned with each other with the orientation of end-end with second pressure chamber 28, and extend along longitudinal axis 24.First pressure chamber
26 and second pressure chamber 28 separated by separator 30, the separator 30 is by first pressure chamber 26 and second pressure chamber
28 are kept completely separate and keep apart.
First pressure chamber 26 accommodates the first fluid 32 being placed in one.First fluid 32 can including but not limited to for example
Oily such liquid.However, it should be understood that first fluid 32 can alternatively include gas.First pressure chamber 26 and second is pressed
Power chamber 28 is separated from each other and not fluid communication with each other.So as to, first fluid 32 do not advance in second pressure chamber 28 or with
Other modes are connected with second pressure chamber 28.
First bar 34 is concentrically arranged in first pressure chamber 26, and edge extends along longitudinal axis 24.First bar 34
Including inner end 36, it is arranged in first pressure chamber 26.First bar 34 is along longitudinal axis 24 relative to First pressure chamber
Room 26 is movable so that the inner end 36 of the first bar 34 is moved in first pressure chamber 26.First bar 34 includes outer end
38, it is configured for attachment to structure as the wheel (not shown) of such as but not limited to vehicle (not shown).
First piston 40 is attached to the inner end 36 of the first bar 34.First piston 40 interacts with first fluid 32,
To buffer the first moving along longitudinal axis 24 of bar 34.First pressure chamber 26 is divided into the first half portion 42 and by first piston 40
Two half portions 44.First piston 40 includes that the first half portion 42 with first pressure chamber 26 and each fluid of the second half portion 44 connect
Logical first fluid port 46.In first piston 40 when moving in first pressure chamber 26, first fluid 32 move by
First fluid port 46 between first half portion 42 and the second half portion 44 of first pressure chamber 26, so that first pressure chamber
The pressure of 26 the first half portion 42 and the second half portion 44 in each is equal.First fluid port 46 limits first pressure chamber 26
The first half portion 42 and the second half portion 44 between first fluid 32 motion, thus limit the motion of first piston 40, it is and right
First bar 34 enters row buffering relative to the motion of main casing 22.
First floating piston 48 is arranged in first pressure chamber 26, in the first half portion 42 or the of first pressure chamber 26
In in two half portions 44.First floating piston 48 is by first half portion 42 or the second half portion 44 of first pressure chamber 26
One is divided into the first fluid chamber 50 for accommodating first fluid 32 and the first gas chamber 52 for accommodating gas, and gas is for example but not
It is limited to nitrogen.Thus, if the first floating piston 48 is arranged in the first half portion 42 of first pressure chamber 26, first floats
42 points of first half portion of first pressure chamber 26 is first fluid chamber 50 and first gas chamber 52 by piston 48.Alternatively,
And as illustrated in fig. 1 and 2, if the first floating piston 48 is arranged in the second half portion 44 of first pressure chamber 26, first floats
44 points of second half portion of first pressure chamber 26 is first fluid chamber 50 and first gas chamber 52 by piston 48.
Second pressure chamber 28 accommodates magneto-rheological fluid 54.When magnetic field is born, magneto-rheological fluid greatly increases its table
Viscosity is seen, to the point for becoming viscoelastic solid.Preferably, magneto-rheological fluid 54 includes iron particle.Conversely, first fluid 32 is not wrapped
Include iron particle.
Buffer unit 20 includes the second bar 56 extended along longitudinal axis 24.Second bar 56 includes attachment end 58, described
Attachment end is arranged on the outside of second pressure chamber 28.Attachment end 58 is configured for attachment to such as but not limited to vehicle
Structure as vehicle body.Second bar 56 includes inner end 60, and the inner end is arranged in second pressure chamber 28.Second
Piston 62 is attached to the inner end 60 of the second bar 56.Second piston 62 interacts with magneto-rheological fluid 54.The edge of second bar 56
Longitudinal axis 24 are movable relative to main casing 22 and second pressure chamber 28 so that second piston 62 is in second pressure chamber 28
Movably.
28 points by second pressure chamber of second piston 62 is the first half portion 64 and the second half portion 66.Second piston 62 include with
First half portion 64 and the second half portion 66 of second pressure chamber 28 each be in fluid communication second fluid port 68.Second piston
62 submerge in magneto-rheological fluid 54.In second piston 62 when moving in second pressure chamber 28, magneto-rheological fluid motion passes through
Second fluid port 68 between first half portion 64 and the second half portion 66 of second pressure chamber 28, so that second pressure chamber
Pressure of first half portion 64 and the second half portion 66 of room 28 in each is equal.
Second floating piston 70 is arranged in second pressure chamber 28, in the first half portion 64 or the of second pressure chamber 28
In in two half portions 66.Second floating piston 70 is by first half portion 64 or the second half portion 66 of second pressure chamber 28
One is divided into the second fluid chamber 72 for accommodating magneto-rheological fluid and the second gas chamber 74 for accommodating gas, and gas is for example but not
It is limited to nitrogen.Thus, and as illustrated in fig. 1 and 2, if the second floating piston 70 is arranged on the first half portion of second pressure chamber 28
In 64, then 64 points of first half portion of second pressure chamber 28 is second fluid chamber 72 and second gas by the second floating piston 70
Chamber 74.Alternatively, if the second floating piston 70 is arranged in the second half portion 66 of second pressure chamber 28, second floats
66 points of second half portion of second pressure chamber 28 is second fluid chamber 72 and second gas chamber 74 by piston 70.
Second bar 56 is movable relative to main casing 22, to adjust the length of buffer unit 20.More specifically, the phase of the second bar 56
The length to adjust between the attachment end 58 of the second bar 56 and main casing 22 movable for main casing 22.So as to buffer unit 20
Adjustable length be length between the attachment end 58 of the second bar 56 and main casing 22, and be not the outer end of the first bar 34
Length between the attachment end 58 of the bar 56 of portion 38 and second.
Buffer unit 20 includes magnetic source 76, and it is operable as applying magnetic field to magneto-rheological fluid 54.Preferably, magnetic source
76 include but is not limited to electromagnet 78.Electromagnet 78 is set to and the magnetic contact of magneto-rheological fluid 54.Electromagnet 78 is operable as
Magnetic field is applied to magneto-rheological fluid 54 in response to electric current.Magneto-rheological fluid increases viscosity in response to the magnetic field for being applied, with
Position of the second piston 62 in second pressure chamber 28 is fixed.As described above, electromagnet 78 is operable as in response to electric current
And the viscosity of magneto-rheological fluid 54 is increased to into viscoelastic solid.
No in the case of the magnetic field of electromagnet 78, magneto-rheological fluid 54 can be flowed through in second pressure chamber
The second fluid port 68 of the second piston 62 between first half portion 64 and the second half portion 66 of room 28.In response to the magnetic for applying
, the viscosity increase of magneto-rheological fluid, this prevents magnetorheological fluid flow by the first half portion 64 in second pressure chamber 28
And the second second fluid port 68 between half portion 66, this substantially prevents second piston 62 from transporting in second pressure chamber 28
It is dynamic, so that the length of buffer unit 20 is fixed and defined to the second bar 56 relative to the position of main casing 22.
As illustrated in fig. 1 and 2, electromagnet 78 is arranged in second pressure chamber 28, and is attached in second pressure chamber 28
Second piston 62 and can move together with the second piston 62.However, it should be understood that electromagnet 78 can be positioned at it is some other
, allow electromagnet 78 to magneto-rheological fluid apply magnetic field relative position.
Electronic control unit 80 is connected to electromagnet 78, and is operable as the electric current for controlling to be applied to electromagnet 78.Electronics
Control unit 80 includes being applied to all hardware, software, sensor, connection necessary to the electric current of electromagnet 78 for control
Part, communication component etc..Electronic control unit 80 is operable as controlling the excitation and deactivation of electromagnet 78, to realize second piston
62 along longitudinal axis 24 expectation axial location.More specifically, electronic control unit 80 is operable as so that electromagnet 78 is deactivated
Encourage, to allow magneto-rheological fluid 54 to flow between first half portion 64 and the second half portion 66 of second pressure chamber 28, and may be used also
Operate to encourage electromagnet 78 to prevent magneto-rheological fluid 54 in first half portion 64 and the second half portion 66 of second pressure chamber 28
Between flow.
The method for additionally providing the length of adjustment buffer unit 20.Method includes carrying out the current length of buffer unit 20
Sensing.The current length of buffer unit 20 can be sensed in any suitable manner and/or be determined, such as by being directly monitored by
One or more sensors of the length of buffer unit 20, or by monitoring that the position of relative position between wheel and automobile body passes
Sensor, and subsequently calculate the current length of buffer unit 20.Electronic control unit 80 can also sense the position phase of wheel of vehicle
For automobile body position over time, to calculate the change of height of car, and thus calculate buffer unit 20
Current length change.Electronic control unit 80 can also sense the speed of vehicle and the acceleration of automobile body, that is, go off course,
Pitching and/or rolling.
Subsequently select the desired length of buffer unit 20.Desired length can be based on one or more selecting factors, for example
But it is not limited to the acceleration of the speed of vehicle, the present level of vehicle and/or automobile body.For example, the length of buffer unit 20
The predetermined acceleration limit, and/or buffer unit 20 can be less than in car speed more than the acceleration of the predetermined speed limit, vehicle body
Current length be more than predetermined length when reduce.Alternatively, the length of buffer unit 20 can be less than pre- constant speed in car speed
When the degree limit, the acceleration of vehicle body are less than predetermined length more than the current length of the predetermined acceleration limit, and/or buffer unit 20
Increase.The predetermined speed limit can include any speed of vehicle, it is preferred that being defined to require more preferable vehicle performance more
At high speed.For example, the predetermined speed limit can be defined as equal to or close 50mph.The predetermined acceleration limit can include vehicle body
Any acceleration, it is preferred that being defined to need the higher acceleration speed of more preferable vehicle operating.Buffer unit 20 work as
Front length can be defined to any length in the adjustable range of buffer unit 20.
The current length of buffer unit 20 must be measured or be determined so that electronic control unit 80 can calculate buffering dress
Put whether 20 should be lengthened out or shorten, to realize desired length, and also determine that needs adjustment how much to realize desired length.
Buffer unit 20 current length not in the preset range of desired length when, then electronic control unit 80 can be with
Excitation electromagnet 78, to allow magneto-rheological fluid 54 to flow through the first half portion 64 and the second half portion in second pressure chamber 28
The second fluid port 68 of the second piston 62 between 66, to allow the second bar 56 to move along longitudinal axis 24.For example, electronics control
Unit processed 80 can over time be more than the precalculated position limit, car speed in the position of wheel relative to the position of vehicle body
More than the predetermined speed limit and vehicle body acceleration be less than the predetermined acceleration limit when deactivate electromagnet 78, to adjust buffer unit
20 length.
When the current length of buffer unit 20 is in the preset range of desired length, then electronic control unit 80 can be encouraged
Electromagnet 78, to increase the viscosity of magneto-rheological fluid 54 and prevent magneto-rheological fluid 54 in the first half portion of second pressure chamber 28
64 and second flow between half portion 66, and the second bar 56 is fixed along the axial location of longitudinal axis 24.For example, Electronic Control list
Unit 80 can be less than over time relative to the position of vehicle body in the position of wheel less than the precalculated position limit, car speed
Electromagnet 78 is encouraged when the predetermined speed limit or vehicle body acceleration are more than the adjustment predetermined acceleration limit, to prevent buffer unit 20
Adjustment.
Electronic control unit 80 can allow the second bar 56 to move along longitudinal axis 24 using jolting (bounce) for vehicle,
And while electromagnet 78 is de-energized, to adjust the length of buffer unit 20.Jolt to adjust buffer unit by using vehicle
20 length, it is not necessary to which external power supply is being lifted and/or reduce vehicle to change the length of buffer unit 20.In order that using car
Jolt to adjust the length of buffer unit 20, electronic control unit 80 must measuring vehicle height and when determine vehicle
In the top of circulation of jolting, i.e., in high point, and determine when vehicle is in the bottom of circulation of jolting, i.e. low spot.
In order to reduce the length of buffer unit 20, electronic control unit 80 is caused when the top of circulation of jolting is in vehicle
Electromagnet 78 is de-energized, and thus allows the second bar 56 to move relative to main casing 22, with downward in circulation of jolting with vehicle
The length of buffer unit 20 is reduced when motion or reduction.When the length of buffer unit 20 has been decreased to desired length, electronics
Control unit 80 causes electromagnet 78 to be energized, and position of second bar 56 relative to main casing 22 is fixed.
In order to increase the length of buffer unit 20, electronic control unit 80 is caused when the bottom of circulation of jolting is in vehicle
Electromagnet 78 is de-energized, and thus allows the second bar 56 to move relative to main casing 22, with vehicle jolt circulation in upwards
Increase the length of buffer unit 20 when motion or rising.When the length of buffer unit 20 has increased to desired length, electronics
Control unit 80 causes electromagnet 78 to be energized, and position of second bar 56 relative to main casing 22 is fixed.
Because vehicle can not in each jolt circulation so that the length of buffer unit 20 increases to desired length,
The length of buffer unit 20 can need iteratively to increase, i.e., incrementally realize desired length.Thus, the length of buffer unit 20 will
Increase a part for desired length, the desired length until realizing buffer unit 20 in each jolts circulation.
Referring to Fig. 3 and 4, the alternative embodiment of buffer unit is usually displayed on 120.Buffer unit 120 shown in Fig. 3 and 4
Alternative embodiment operated in the mode same with the buffer unit 20 shown in Fig. 1 and 2, but have the difference in structure, to carry
For the device of more axially compact.The alternative embodiment identical unit with the buffer unit 120 shown in Fig. 3 and 4 of buffer unit 20
Part is represented with identical reference in Fig. 1 and 2, and is not described in detail below.
The alternative embodiment of buffer unit 120 include the second bar, hereinafter referred to as secondary housing 156, it prolongs along longitudinal axis 24
Stretch, and concentrically position with regard to main casing 22.Secondary housing 156 includes and/or limits hollow interior region 190.Secondary housing 156
Interior zone 190 limit and/or formed second pressure chamber 128.Second piston 162 is attached to main casing 22, and engages secondary
The inner surface 192 of the interior zone 190 of housing 156.Secondary housing 156 is relative to second piston 162 and above it along longitudinal axiss
Line 24 is movable.Secondary housing 156 is disposed radially within outside the outer surface 194 of main casing 22 relative to longitudinal axis 24.Secondary housing
156 is movable relative to main casing 22.So as to secondary housing 156 is relative to the outer surface 194 of main casing 22 and above it along longitudinal direction
Axis 24 is moved.Magneto-rheological fluid 54 is arranged in the interior zone 190 of time housing 156.
128 points by second pressure chamber of second piston 162 is the first half portion 164 and the second half portion 166.Second piston 162
Including the second fluid port that each is in fluid communication with first half portion 164 and the second half portion 166 of second pressure chamber 128
168.Second piston 162 is submerged in magneto-rheological fluid 54.In second piston 162 when moving in second pressure chamber 128, magnetic current
Fluid 54 is moved by the second fluid port between first half portion 164 and the second half portion 166 of second pressure chamber 128
168, so that the pressure of first half portion 164 and the second half portion 166 of second pressure chamber 128 in each is equal.
Second floating piston 170 is arranged in second pressure chamber 128, in the first half portion 164 of second pressure chamber 128
Or second in half portion 166.Second floating piston 170 is by the first half portion 164 of second pressure chamber 128 or the second half
One in portion 166 is divided into the second fluid chamber 172 for accommodating magneto-rheological fluid 54 and the second chamber 174 for accommodating nitrogen.Cause
And, and as shown in Figures 3 and 4, if the second floating piston 170 is arranged in the first half portion 164 of second pressure chamber 128,
164 points of first half portion of second pressure chamber 128 is second fluid chamber 172 and second gas chamber by the second floating piston 170
Room 174.Alternatively, if the second floating piston 170 is arranged in the second half portion 166 of second pressure chamber 128, second floats
166 points of second half portion of second pressure chamber 128 is second fluid chamber 172 and second gas chamber 174 by piston 170.
Secondary housing 156 is movable relative to main casing 22, to adjust the length of buffer unit 120.More specifically, secondary housing
156 relative to the movable length to adjust between the attachment end 158 of time housing 156 and main casing 22 of main casing 22.So as to slow
The adjustable length of flushing device 120 is the length between the attachment end 158 of time housing 156 and main casing 22, and is not first
Length between the outer end 38 of bar 34 and the attachment end 158 of secondary housing 156.
As shown in Figures 3 and 4, electromagnet 178 is arranged in second pressure chamber 128, and is attached to second pressure chamber 128
In second piston 162.However, it should be understood that electromagnet 178 can be positioned at permission electromagnet 178 applying to magneto-rheological fluid 54
Plus some other relative positions in magnetic field.
No in the case of the magnetic field of electromagnet 178, magneto-rheological fluid 54 can be flowed through in second pressure
The second fluid port 168 of the second piston 162 between first half portion 164 and the second half portion 166 of chamber 128.In response to applying
Plus magnetic field, the viscosity increase of magneto-rheological fluid 54, this prevents magnetorheological fluid flow by the of second pressure chamber 128
Second fluid port 168 between one half portion 164 and the second half portion 166, this substantially prevents second piston 162 in second pressure
Move in chamber 128, so that buffer unit 120 is fixed and defined to secondary housing 156 relative to the position of main casing 22
Length.
Detailed description and display in accompanying drawing is support and description to the present invention, and the scope of the present invention is only by power
Profit requires to limit.Those skilled in the art can although the better model to performing the present invention has carried out detailed description
Learn many alternative designs and embodiment for implementing the present invention within the scope of the appended claims.
Claims (10)
1. a kind of buffer unit, including：
First pressure chamber, extends along a longitudinal axis and accommodates first fluid；
First bar, extends along a longitudinal axis and including the inner end being arranged in first pressure chamber, wherein the first bar is along vertical
It is movable relative to first pressure chamber to axis；
First piston, be attached to the first bar inner end and with first fluid interact, with to the first bar along longitudinal axis
Motion enter row buffering；
Second pressure chamber, extends along a longitudinal axis and accommodates magneto-rheological fluid；
Second bar, extends along a longitudinal axis；
Second piston, is attached to the second bar and interacts with magneto-rheological fluid；
Electromagnet, is set to and magneto-rheological fluid magnetic contact, and is operable as applying magneto-rheological fluid in response to electric current
Magnetic field, to increase the viscosity of magneto-rheological fluid, the position of second piston is fixed in second pressure chamber.
2. buffer unit as claimed in claim 1, wherein first pressure chamber and second pressure chamber are separated from each other and each other
It is not in fluid communication.
3. buffer unit as claimed in claim 1, wherein the electromagnet is arranged in second pressure chamber.
4. buffer unit as claimed in claim 1, wherein the electromagnet is attached to the second piston in second pressure chamber
And can be with the second piston motion.
5. buffer unit as claimed in claim 1, wherein the magneto-rheological fluid includes iron particle, and wherein first fluid is not
Including iron particle.
6. second pressure chamber is divided into the first half portion and second by buffer unit as claimed in claim 1, wherein second piston
Half portion, and including with first half portion and the second half portion of second pressure chamber each be in fluid communication fluid port, with
Do not have to allow magneto-rheological fluid in first half portion and the second half portion of second pressure chamber in the case of the magnetic field of electromagnet
Between flow.
7. the buffer unit described in claim 6, further includes the second floating piston, it is arranged in second pressure chamber,
In in first half portion or the second half portion of second pressure chamber, by first half portion or second of second pressure chamber
One in half portion is divided into the fluid chamber for accommodating magneto-rheological fluid and the gas chamber for accommodating nitrogen.
8. the buffer unit described in claim 1, further includes electronic control unit, and the electronic control unit is connected to electromagnetism
Body and the electric current controlled to electromagnet is operable as, wherein electronic control unit is operable as：
Electromagnet is deactivated, to allow magneto-rheological fluid to flow between first half portion and the second half portion of second pressure chamber；
Excitation electromagnet, to prevent magneto-rheological fluid from flowing between first half portion and the second half portion of second pressure chamber；With
The excitation and deactivation of control electromagnet, to realize expectation axial location of the second piston along longitudinal axis.
9. buffer unit as claimed in claim 1, further includes main casing, and the main casing limits the First pressure chamber
Room.
10. buffer unit as claimed in claim 9, wherein the main casing limits second pressure chamber, first pressure chamber
It is coaxially aligned with each other with the orientation of end-end along longitudinal axis with second pressure chamber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/105,273 | 2013-12-13 | ||
| US14/105,273 US9186951B2 (en) | 2013-12-13 | 2013-12-13 | Height adjustable damping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104712702A CN104712702A (en) | 2015-06-17 |
| CN104712702B true CN104712702B (en) | 2017-04-12 |
Family
ID=53192802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410645863.4A Active CN104712702B (en) | 2013-12-13 | 2014-11-12 | Height adjustable damping device |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9186951B2 (en) |
| CN (1) | CN104712702B (en) |
| DE (1) | DE102014118300B4 (en) |
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- 2013-12-13 US US14/105,273 patent/US9186951B2/en active Active
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2014
- 2014-11-12 CN CN201410645863.4A patent/CN104712702B/en active Active
- 2014-12-10 DE DE102014118300.2A patent/DE102014118300B4/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1971080A (en) * | 2005-11-25 | 2007-05-30 | 吕崇耀 | Electromagnetic-rheological fluid hydro-pneumatic hanging system |
| CN200975034Y (en) * | 2006-10-13 | 2007-11-14 | 北京工业大学 | Double extending rod double cylinder electrical current changeable damper |
| CN103195858A (en) * | 2013-04-15 | 2013-07-10 | 沈阳航空航天大学 | Magnetorheological buffering unit structure based on impact load and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| US9186951B2 (en) | 2015-11-17 |
| CN104712702A (en) | 2015-06-17 |
| US20150165860A1 (en) | 2015-06-18 |
| DE102014118300A1 (en) | 2015-06-18 |
| DE102014118300B4 (en) | 2020-08-06 |
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